Volume 54, Issue 12

Z. E. Meziani, P. Barreau, M. Bernheim, J. Morgenstern, S. Turck-Chieze, R. Altemus, J. McCarthy, L. J. Orphanos, R. R. Whitney, G. P. Capitani, E. De Sanctis, S. Frullani, and F. Garibaldi

Phys. Rev. Lett. 54, 1233 (1985) - Published 25 March, 1985

Observation of $Λ$ -Hypernuclei in the Reaction ${}^{12}C (π^{+}, K^{+}) {}_{Λ}^{12}C$

C. Milner, M. Barlett, G. W. Hoffmann, S. Bart, R. E. Chrien, P. Pile, P. D. Barnes, G. B. Franklin, R. Grace, H. S. Plendl, J. F. Amann, T. S. Bhatia, T. Kozlowski, J. C. Peng, R. R. Silbar, H. A. Thiessen, C. Glashausser, J. A. McGill, R. Hackenburg, E. V. Hungerford, and R. L. Stearns

Phys. Rev. Lett. 54, 1237 (1985) - Published 25 March, 1985

Atoms and Molecules

Coherent and Incoherent Echo Spectroscopy with Extended-Time Excitation

A. Schweiger, L. Braunschweiler, J. -M. Fauth, and R. R. Ernst

Phys. Rev. Lett. 54, 1241 (1985) - Published 25 March, 1985

Observation of Radiation-Pressure Trapping of Particles by Alternating Light Beams

A. Ashkin and J. M. Dziedzic

Phys. Rev. Lett. 54, 1245 (1985) - Published 25 March, 1985

Circular Dichroism in Photoelectron Angular Distributions from Oriented Linear Molecules

Richard L. Dubs, S. N. Dixit, and V. McKoy

Phys. Rev. Lett. 54, 1249 (1985) - Published 25 March, 1985

Fluids, Plasmas, and Electric Discharges

Nonlinear Global Alfvén Eigenmodes

F. Brunel, J. -N. Leboeuf, and S. M. Mahajan

Phys. Rev. Lett. 54, 1252 (1985) - Published 25 March, 1985

Condensed Matter: Structure, Etc.

Evidence for a Novel Chemisorption Bond: Formate (HC $O_{2}$ ) on Cu(100)

J. Stöhr, D. A. Outka, R. J. Madix, and U. Döbler

Phys. Rev. Lett. 54, 1256 (1985) - Published 25 March, 1985

Phonon Anomalies in ${Nb}_{3}$ Sn

L. Pintschovius, H. Takei, and N. Toyota

Phys. Rev. Lett. 54, 1260 (1985) - Published 25 March, 1985

Monte Carlo Renormalization-Group Study of the Dynamics of an Unstable State

J. Viñals, Martin Grant, M. San Miguel, J. D. Gunton, and E. T. Gawlinski

Phys. Rev. Lett. 54, 1264 (1985) - Published 25 March, 1985

Frequency Behavior of the Second-Sound Damping in the Smectic- $A$ Phase of Octylcyanobiphenyl: Evidence for the Divergence of Viscosities

C. Baumann, J. P. Marcerou, J. Prost, and J. C. Rouillon

Phys. Rev. Lett. 54, 1268 (1985) - Published 25 March, 1985

Molecular Clustering in a Two-Dimensional Metal-Ammonia Solution

X. W. Qian, D. R. Stump, B. R. York, and S. A. Solin

Phys. Rev. Lett. 54, 1271 (1985) - Published 25 March, 1985

Model-Independent Structure Determination of the InSb(111)2×2 Surface with Use of Synchrotron X-Ray Diffraction

J. Bohr, R. Feidenhans'l, M. Nielsen, M. Toney, R. L. Johnson, and I. K. Robinson

Phys. Rev. Lett. 54, 1275 (1985) - Published 25 March, 1985

Condensed Matter: Electronic Properties, Etc.

Mobility Modulation of the Two-Dimensional Electron Gas Via Controlled Deformation of the Electron Wave Function in Selectively Doped AlGaAs-GaAs Heterojunctions

K. Hirakawa, H. Sakaki, and J. Yoshino

Phys. Rev. Lett. 54, 1279 (1985) - Published 25 March, 1985

Binding of Shallow Donor Impurities in Quantum-Well Structures

N. C. Jarosik, B. D. McCombe, B. V. Shanabrook, J. Comas, John Ralston, and G. Wicks

Phys. Rev. Lett. 54, 1283 (1985) - Published 25 March, 1985

Excitations in Incommensurate Biphenyl: Proton Spin-Lattice Relaxation

Shang-Bin Liu and Mark S. Conradi

Phys. Rev. Lett. 54, 1287 (1985) - Published 25 March, 1985

ESR Spectra of ${Er}^{3 +}$ in Sm $B_{6}$ Single Crystals: Dynamic Jahn-Teller Effect in a Mixed-Valence Compound

H. Sturm, B. Elschner, and K. -H. Höck

Phys. Rev. Lett. 54, 1291 (1985) - Published 25 March, 1985

Spins in Si: P Close to the Metal-Insulator Transition

M. A. Paalanen, A. E. Ruckenstein, and G. A. Thomas

Phys. Rev. Lett. 54, 1295 (1985) - Published 25 March, 1985

Dynamic $M$ -Shell Effects in the Ultraviolet Absorption Spectrum of Metallic Potassium

A. C. Tselis and A. W. Overhauser

Phys. Rev. Lett. 54, 1299 (1985) - Published 25 March, 1985

Picosecond Time-Resolved Photoemission Study of the InP(110) Surface

R. Haight, J. Bokor, J. Stark, R. H. Storz, R. R. Freeman, and P. H. Bucksbaum

Phys. Rev. Lett. 54, 1302 (1985) - Published 25 March, 1985

Femtosecond Dynamics of Resonantly Excited Excitons in Room-Temperature GaAs Quantum Wells

W. H. Knox, R. L. Fork, M. C. Downer, D. A. B. Miller, D. S. Chemla, C. V. Shank, A. C. Gossard, and W. Wiegmann

Phys. Rev. Lett. 54, 1306 (1985) - Published 25 March, 1985

Defects in a Nonlinear Pseudo One-Dimensional Solid

Graciela B. Blanchet and C. R. Fincher, Jr.

Phys. Rev. Lett. 54, 1310 (1985) - Published 25 March, 1985

${}^{55}{Mn}$ NMR Study of the Collective Excitations in Spin-Glasses

H. Alloul and P. Mendels

Phys. Rev. Lett. 54, 1313 (1985) - Published 25 March, 1985

Attractive Interaction and Pairing in Fermion Systems with Strong On-Site Repulsion

J. E. Hirsch

Phys. Rev. Lett. 54, 1317 (1985) - Published 25 March, 1985

Low-Frequency Relaxation in Ising Spin-Glasses

Mohit Randeria, James P. Sethna, and Richard G. Palmer

Phys. Rev. Lett. 54, 1321 (1985) - Published 25 March, 1985

Geophysics, Astronomy, and Astrophysics

Fractal Sandstone Pores: Implications for Conductivity and Pore Formation

A. J. Katz and A. H. Thompson

Phys. Rev. Lett. 54, 1325 (1985) - Published 25 March, 1985

COMMENTS

Comment on "Effects of Relative Energy Contributions in a Two-Interaction Transition"

R. N. Cahn and J. D. Jackson

Phys. Rev. Lett. 54, 1329 (1985) - Published 25 March, 1985

Reiss Responds

Howard R. Reiss

Phys. Rev. Lett. 54, 1330 (1985) - Published 25 March, 1985

Identification of Zero-Sound Attenuation Satellites in ${}^{3}{He}$ - $B$

B. N. Engel, R. F. Berg, and G. G. Ihas

Phys. Rev. Lett. 54, 1331 (1985) - Published 25 March, 1985

${As}_{Ga}$ -Induced Dichroism in GaAs

U. Kaufmann

Phys. Rev. Lett. 54, 1332 (1985) - Published 25 March, 1985

Meyer, Spaeth, and Scheffler Respond

B. K. Meyer, J. -M. Spaeth, and M. Scheffler

Phys. Rev. Lett. 54, 1333 (1985) - Published 25 March, 1985

Comment on "Theory for the Anomalous $M_{4, 5} VV$ Auger Spectrum for Dilute Palladium in Silver"

M. Vos, D. van der Marel, G. A. Sawatzky, M. Davies, P. Weightman, and P. T. Andrews

Phys. Rev. Lett. 54, 1334 (1985) - Published 25 March, 1985

Hedegård and Johansson Respond

Per Hedegård and Börje Johansson

Phys. Rev. Lett. 54, 1335 (1985) - Published 25 March, 1985

ERRATA

Erratum: Observation of prompt like-sign Dimuon production in Neutrino reactions [Phys. Rev. Lett. 46, 1555 (1981)]

K. Nishikawa, D. Buchholz, B. C. Barish, J. F. Bartlett, R. Blair, Y. Chu, J. Lee, P. Linsay, J. Ludwig, R. Messner, P. Mine, F. J. Sciulli, M. Shaevitz, E. Siskind, D. Edwards, H. Edwards, H. E. Fisk, Y. Fukushima, G. Krafczyk, D. Nease, A. Bodek, W. Marsh, and O. Fackler

Phys. Rev. Lett. 54, 1336 (1985) - Published 25 March, 1985

New Fluctuation-Induced First-Order Antiferrodistortive Phase Transitions

Jeffrey W. Felix and Dorian M. Hatch

Phys. Rev. Lett. 54, 1337 (1985) - Published 25 March, 1985

Quantum Interference Effect for Two Atoms Radiating a Single Photon

Philippe Grangier, Alain Aspect, and Jacques Vigue

Phys. Rev. Lett. 54, 1337 (1985) - Published 25 March, 1985